//private EventHandler<WebRequestStartEventArgs> m_WebRequestStartEventHandler;
        //private EventHandler<WebRequestSuccessEventArgs> m_WebRequestSuccessEventHandler;
        //private EventHandler<WebRequestFailureEventArgs> m_WebRequestFailureEventHandler;

        /// <summary>
        /// 初始化 Web 请求管理器的新实例。
        /// </summary>
        public WebRequestManager()
        {
            m_TaskPool = new TaskPool <WebRequestTask>();
            m_Timeout  = 30f;
        }